QmlDesigner.Instances: Move instances out of process

The complete qml emulation layer (instances) is moved
into another external process (qmlpuppet).

Summary of architectural changes:

- Asynchronous messaging
    Handling commands and data transfer asynchronously reduces the
    amount of context switches between processes.

- Proxy classes for client process
    This classes abstract the inter process communication

- QVariant based command parsing and serialization
    Using LocalSocket in bidirectional manner for communications
    of commands and data transfer.

- Integer based identifier instead of ModelNode in client process
    The qml emulation layer (instances) has no more depencies to our
    internal data model.

- Timer based rendering
    Rendering in instances is controlled by a timer. Only dirty items
    are updated.

1 files changed, 33 insertions, 0 deletions

diff --git a/src/plugins/qmldesigner/designercore/instances/changefileurlcommand.cpp b/src/plugins/qmldesigner/designercore/instances/changefileurlcommand.cpp
new file mode 100644
index 0000000000..39939102ac
--- /dev/null
+++ b/src/plugins/qmldesigner/designercore/instances/changefileurlcommand.cpp
@@ -0,0 +1,33 @@
+#include "changefileurlcommand.h"
+
+namespace QmlDesigner {
+
+ChangeFileUrlCommand::ChangeFileUrlCommand()
+{
+}
+
+ChangeFileUrlCommand::ChangeFileUrlCommand(const QUrl &fileUrl)
+    : m_fileUrl(fileUrl)
+{
+}
+
+QUrl ChangeFileUrlCommand::fileUrl() const
+{
+    return m_fileUrl;
+}
+
+QDataStream &operator<<(QDataStream &out, const ChangeFileUrlCommand &command)
+{
+    out << command.fileUrl();
+
+    return out;
+}
+
+QDataStream &operator>>(QDataStream &in, ChangeFileUrlCommand &command)
+{
+    in >> command.m_fileUrl;
+
+    return in;
+}
+
+} // namespace QmlDesigner